The 'Vaccine' for Rabies was first developed by Louis Pasteur using: MCQ with Answer and Explanation

The 'Vaccine' for Rabies was first developed by Louis Pasteur using:
A. Weakened virus obtained from the spinal cord of infected rabbits
B. Live attenuated rabies virus
C. A subunit of the rabies virus
D. Killed rabies virus
Answer: Option A
Solution (By JKSSB Mock Tests)
In 1885, Louis Pasteur developed the first effective vaccine against rabies. He achieved this by serially passaging the rabies virus (obtained from the saliva of infected dogs) through the spinal cords of rabbits. This process attenuated (weakened) the virus for rabbits but made it virulent for dogs. He then dried the infected spinal cords to further weaken the virus and used this attenuated material to successfully inoculate and protect a boy, Joseph Meister, who had been bitten by a rabid dog.

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Practice More Biology Questions

Question #1
Consider statements about scientists: 1. Robert Hooke discovered cells. 2. Antonie van Leeuwenhoek discovered bacteria. 3. Charles Darwin proposed the cell theory. Which are correct?
A. 1 and 2 only
B. 1, 2 and 3
C. 1 and 3 only
D. 2 and 3 only

Correct Answer: Option A


Explanation:
Robert Hooke, in 1665, observed dead cork tissue under a microscope and coined the term 'cell' for the box-like structures he saw. Antonie van Leeuwenhoek, using his superior single-lens microscopes in the 1670s, was the first to observe and describe living microorganisms, including bacteria and protozoa. Charles Darwin proposed the theory of evolution by natural selection; the cell theory was proposed by Matthias Schleiden and Theodor Schwann. Thus, statements 1 and 2 are correct.

This question belongs to: Science Biology
Question #2
In the human body, the 'Hypothalamus' contains several nuclei that regulate various functions. The 'Supraoptic nucleus' primarily synthesizes:
A. Dopamine
B. Antidiuretic Hormone (ADH) and Oxytocin
C. Somatostatin
D. Releasing hormones

Correct Answer: Option B


Explanation:
The hypothalamus contains numerous nuclei, each with specific functions. The supraoptic nucleus (SON) and the paraventricular nucleus (PVN) are large neurosecretory nuclei located in the anterior hypothalamus. The supraoptic nucleus primarily synthesizes Antidiuretic Hormone (ADH, or vasopressin), while the paraventricular nucleus primarily synthesizes Oxytocin (though both nuclei produce both hormones in smaller amounts). These hormones are transported down the axons of these neurons and stored in the posterior pituitary for release into the bloodstream.

This question belongs to: Science Biology
Question #3
The botanical name of the potato plant is:
A. Solanum tuberosum
B. Solanum melongena
C. Lycopersicon esculentum
D. Capsicum annuum

Correct Answer: Option A


Explanation:
Solanum tuberosum is the scientific name of potato, a member of the Solanaceae family. Solanum melongena is brinjal (eggplant), Capsicum annuum is chili, and Lycopersicon esculentum is tomato. Potato is a tuber (modified stem) rich in starch, and is one of the world's major food crops.

This question belongs to: Science Biology